Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE45688 | Vacuum sewer system | Vesa Lappalainen, Kaj Ronnblad | 2015-09-29 |
| 7845028 | Vacuum sewer system | — | 2010-12-07 |
| 7770241 | Vacuum sewer system | Vesa Lappalainen, Kaj Ronnblad | 2010-08-10 |
| 6748973 | Valve means | — | 2004-06-15 |
| 5983414 | Electrical control device | Paul Wallström | 1999-11-16 |
| 5495626 | Electrical control device | Paul Wallstro/ m | 1996-03-05 |
| 5165457 | Vacuum sewer arrangement | Henry Olin, Sven Oldfelt | 1992-11-24 |
| 4928326 | Vacuum sewer arrangement | Henry Olin, Sven Oldfelt | 1990-05-29 |